/*
 * Source: http://stackoverflow.com/questions/1306689/launching-activities-within-a-tab-in-android
 */

package com.ku.pksu.bornegaarden.util;

import java.util.Stack;


import android.app.Activity;
import android.app.ActivityGroup;
import android.app.LocalActivityManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;

public class ActivityStack extends ActivityGroup {

  private Stack<String> stack;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (stack == null) stack = new Stack<String>();
    //start default activity
    //push("FirstStackActivity", new Intent(this, Laereplan.class));
  }

  @Override
  public void finishFromChild(Activity child) {
    pop();
  }

  @Override
  public void onBackPressed() {
    pop();
  }


  public void push(String id, Intent intent) {
    Window window = getLocalActivityManager().startActivity(id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
    if (window != null) {
      stack.push(id);
      setContentView(window.getDecorView());
    }
  }

  public void pop() {
    if (stack.size() == 1) finish();
    LocalActivityManager manager = getLocalActivityManager();
    manager.destroyActivity(stack.pop(), true);
    if (stack.size() > 0) {
      Intent lastIntent = manager.getActivity(stack.peek()).getIntent();
      Window newWindow = manager.startActivity(stack.peek(), lastIntent);
      setContentView(newWindow.getDecorView());
    }
  }
}